Retacking machine



ug. 9, i949.

V. E. ZACKERSON RETACKING MACHINE Filed Aug. 16, 1946 INVENTOR Bxl/CTOR E. ZACKERSO/V Arrofv? Patented ug. 9, 1,949

'unirse STATES PATENT OFFICE v RETACKING MACHINE Victor E."Zackerson, Alameda, Calif., assgnorof l oneha1f to Ralph W. Jensen My invention vrelates tomachines and more particularly V tofa retacking machine for renovating rasp bands or the like. l

'A rasp band toY whichmy invention pertains is a' cylinder vof'sheet metal Vperforateclron the bias to receive a plurality of tacks which are held against falling `out partly by friction, but for the most part by aninternal cylinder bearing against the headsofsu'ch tacks. 4' Y e A i The band is -utilizedin the roughing up of tire casings `in preparation forrecapping of the same. After'a periodof use such-ftacksbecome dull and bent and in renovatinl'gthe bands,` such band must be disassembled,1 theold tacks removed and new ones substituted. Inr substitutingfthe new tacks, the burrs aroundthe tack openingsare rst flattened, following whihhnew tacks are insertedby hand into the openings, and are then driven home. f

The perforations'may be on a right or lefthand bias; in either-case making an angle of around 57 with the horizontal; though such angle is not critical. j

Among the objects of'my invention are to provide anovel and improved machine for use in retacking raspfbands or. the likefand to provide a new and` improved machine of simple design for simultaneously driving homeV a plurality of tacks in sheet metal or the like i but adapted particularly for the driving home of tacks in a rasp band or the like after such tacks have been inserted into openings manually.

Additional objects of my invention will be brought out in the following description of a preferred embodiment of the same taken in conjunction with the accompanying drawings wherein- Figure 1 is a side elevational view of my machine illustrating its mode of operation;

Figure 2 is a fragmentary view looking into the front end of such machine;

Figure 3 is a detail in the construction of the machine of Figure 1;

Figure 4 is a plan view of an anvil utilized in the machine of Figure 1;

Figure 5 is a view corresponding to that of Figure 4 but showing a rasp band in position on the anvil.

Referring to the drawings for details, the machine involves a frame I including a base 3 and a vertically disposed arcuate arm 5 at one end of the base, the frame being formed of a pair of similarly shaped members 1 held in spaced relationship 'by an anvil 9 inserted between the base components of the frame and bolted therein.

' 4 Claims. (Cl. 1 1) Such anvil terminates somewhat above the base of the frame in a pluralityof spaced aligned projections II which arediamond-shaped in cross section, with their upper surfaces lying in a common plane. v I l The diamond-shaped lr'irojections are formed by milling intersecting slots across the face of the anvil at angles corresponding to the right and left hand bias ofz the: tackr holes in rasp bands. This adapts thel'machine for use in retacking rasp bands rof `eitlfierthe right or left hand bias type without interchanging of anvils. Depending upon the widthof theanvil, as many as four transverse rows of'taoks may b e driven home at onettirne.` 4

A pressure bar I3"in"li n e with the anvil extends between the' framemembers 1 and is pivotally;-mountedtherebetween "on a pin,v preferably'anangularlyadjustable eccentric I5, such eccentric permitting "adjustaloility of the pressure bar to parallelism with'the anvil in the pressure exerting 1 position of the bar.

Manipulation of the pressure bar is accomplished through'a bell crankf lever' I'I'pivotally mounted at vits fulcrum point on a pin I9 involving a similar angularlyadjustabl'e eccentric passing through the frame Vmembers at' the upper end of the frame. One4` arm of the lever terminates Y in an operating handle'ZI, the other end of this lever being connectedby aV pair'of parallel disposed links 231itoan intermediate point on the pressure bar I3. Such eccentricV provides a means for adjusting the pivot position of the bell crank lever II to permit such previously mentioned adjustments of the pressure bar.

Both adjustments are accordingly necessary to assure uniformly distributed downward pressure between the pressure bar and the anvil, with the work intermediately disposed on the anvil. Such uniformly distributed pressure is important for in the absence thereof, certain of the tacks are apt to be incompletely assembled, and such condition will not only leave such tacks loose and therefore ineicient as rasp elements, but the existence of such incompletely assembled tacks will render it very diiicult for the aforementioned inner cylinder to eiciently hold other tacks from working themselves loose during subsequent use of the rasp band for its intended purpose.

In utilizing the machine, tacks 29 are manually inserted into those openings 3I in a band 33 which were previously occupied by the old tacks. The band is placed on the anvil and due to the relatively large number of holes, a substantially transverse row of tacks will register with the spaces between the diamond shaped projections of the anvil, in spite of the fact that the actual rows are on the bias. With the band disposed on the anvil, the handle is manipulated downwardly to bring the pressure bar down against the heads of the tacks with suicient pressure to drive them home. This procedure is followed around the band until all the tacks are in, following which an inner cylinder 35 is added and the band is then'again ready for use. Y l A From the above description of a preferred embodiment of my invention, it will become apparent that it fullls all the objects previously recited therefor, and while I have described the one embodiment in its preferred form, the same is subject to alterations and modication without departing from the underlying 4principles thereof and I, accordingly, do not desire to be limited in my protection to the specic details illustrated and described,except as may be necessitated by the appended claims.

1. A retackingl machine fAorraspV bands or the like comprising a frame including a base and an upright arcuate arm adjacent an en d of said base; means on 4,which work is to be supported; pressure means pivotally secured to said upright arcuate arm in cooperative relationship to said work support means, said pressure rneans including a pressure bar pivotally supported on a pin through the uprightwarcuate arm of the frame for engaging workgpositioned on said anvil; and means for manipulating said pressure means in the direction of said anvil. c

2. A retacking machine for rasp bands or the like comprising a frame including a base and an upright arcuate arm adjacent an` end of said base, said framebeing'iormed of a pair of similarly shaped members; means `on which work is to be supported, said means including an anvil disposed between the baseportions of said frame members and secured'therein, and terminating above said base portionsis a plurality of spaced aligned projections having upper surfaces in a common plane; pressure means pivotally secured to said upright arcuate arm in cooperative relationship to said work support means, said pressure means including a pressure bar extending between said frame members and pivotally supported on a pin through the uprightA arcuate arm of the frame; and means Afor manipulating said pressure means in the direction of said anvil.

3. A retacking machine for rasp bands or the like comprising a frame including a base and an upright arcuate arm adjacent an end of said base; means on which Work is to be supported; pressure means pivotally secured to said upright arcuate arm in cooperative relationship to said work support means, said pressure means including a pressure bar pivotally supported on a pin through the upright arcuatearm' of the frame; and means for manipulating said pressure means, said means including a bell crank lever pivotally secured to the upper end of said frame, a handle aixed to one arm of said lever and a link interconnecting the other arm of said lever to said PISSSIAIC means: Y 4. A retacking machine for rasp bands or the like comprising a frame including a base and an upright arcuate arm adjacent an end of said base, said frame being formed of a pair of similarly shaped members; meansn'on which work is to be supported, said means including an anvil disposed betwen the baseportions of said frame members and secured therein, and terminating above said baseportions is a plurality of spaced alignedprojetions each of diamond cross-section;A pressure meanshpivotally secured to said upright arcuatemarm in cooperative relationship to said vworknsupport means, said pressure means including a pressure bar extending between said frame members and pivotally supported on a pin through theupright arcuate arm of the frame; and means for manipulating said pressure means, saidmeans including a bell crank lever pivotally secured to the upper end of said frame, a handle aliixed to one arm of said lever and a link interconnecting the other arm of said lever to said pressure means.

VICTOR E. ZACKERSON.

REFERENCES CITED The following Areferences are of record in the file of this patent:

UNITED STATES PATENTS 

